I started the video and it says it has no codex and it can search for it(it looked cool) and it has downloaded them and video works great, but for some reason all the faces on videos I'm watching are blue, how to make them not blue?(I bet its a common problem).

All movies opened from hdd show "blue faces".
Yet sometimes when opening "Nvidea XServer Settings", the next video I play is in normal colors. (only once...opening the same movie again will show blue faces again)

FIX :

Download and install "Sysinfo" app. and open it.
Select "Nvidea" - "Nvidea Display Settings".
Under "X Screen 0" select "X Server Xvideo Settings".
Slide the "Hue" controller all the way down to zero.

If this didn't help (in my case no option to save this setting, but only the option to "quit" Nvidea XServer Settings"), open Totem Movie Player ;

Open the video and check for "blue faces". Let the video continue playing.
Go to "edit", "Preferences", "Display" : Slide the "Hue" controller to zero.
While you're sliding the Hue down, you will see the colors change to normal.

In my case the changes made in Totem Movie Player where also adapted in the SMPlayer and all videos are playing in normal colors now.

In the bug report that Clausi links there are quite a lot of workarounds.

This tip from Le Glun de net looks like the best aproach to me.

If you have this bug (blue and red
color in video are invert) and you
have a nvidia, you don't have to
install or uninstall any software.
Just launch the "nvidia X server
settings", choose your screen (X
screen 0), "Xserver video settings",
"Reset hardware defaults".

Note that it seems to correct itself as soon as you open the Nvidia setting for some people.

For me it whas The video output i had set to Directx (direct draw). I changed it to Open GL and it whas gone. Seems Direct Draw actualy draw the skins blue. Kinda funny real life smurf people. Im using Vlc player and had lots of trouble Turned on Gpu for lagging and Hardware acceleration. Video codec to Open Gl. Still not working good but faces are not blue anymore and is best i can get right know.